import logging
from typing import Optional
from fastapi import APIRouter, HTTPException, Query
from fastapi.responses import JSONResponse
import httpx

from .service import CustomSearchService
from .serializers import SearchResponse, SearchResultItem

app_router = APIRouter()

logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
log = logging.getLogger(__name__)


@app_router.get("/search", response_model=SearchResponse)
async def search_endpoint(
    q: str = Query(..., description="Search query string"),
    num: int = Query(10, ge=1, le=10, description="Number of results to return (1-10)"),
    start: int = Query(1, ge=1, description="Start index for pagination"),
):
    try:
        service = CustomSearchService()
        data = await service.search(query=q, num=num, start=start)

        items = [
            SearchResultItem(
                title=item.get("title"),
                link=item.get("link"),
                displayLink=item.get("displayLink"),
                snippet=item.get("snippet"),
                formattedUrl=item.get("formattedUrl"),
                pagemap=item.get("pagemap"),
            )
            for item in data.get("items", [])
        ]

        search_info = data.get("searchInformation", {}) or {}

        return SearchResponse(
            query=q,
            total_results=search_info.get("totalResults"),
            search_time=search_info.get("searchTime"),
            items=items,
            raw=data,
        )

    except ValueError as e:
        log.error(f"Configuration error: {e}")
        raise HTTPException(status_code=500, detail=str(e))
    except httpx.HTTPStatusError as e:
        log.error(f"Google CSE returned {e.response.status_code}: {e.response.text}")
        raise HTTPException(status_code=e.response.status_code, detail=e.response.text)
    except httpx.RequestError as e:
        log.error(f"Network error calling Google CSE: {e}")
        raise HTTPException(status_code=502, detail=f"Upstream request failed: {e}")
    except Exception as e:
        log.error(f"Unexpected error: {e}")
        raise HTTPException(status_code=500, detail=str(e))